(investigator) A person responsible for the conduct of the clinical trial at a trial site. If a trial is conducted by a team of individuals at the trial site, the investigator is the responsible leader of the team and may be called the principle investigator.

(investigator) A researcher in a clinical trial or clinical study.

(investigator) An individual who actually conducts a clinical investigation (i.e., under whose immediate direction the test article is administered or dispensed to, or used involving a subject, or, in the event of an investigation conducted by a team of individuals, is the responsible leader of that team).

(investigator) An individual who conducts scientific research. In a clinical setting this individual actually conducts and/or supervises the clinical investigation and study-related procedures. The investigator monitors the safety of the trial subjects and investigational staff (under whose immediate direction an agent is administered or dispensed to a subject). The investigator collects and analyses data and study documents, and provides reports in compliance with applicable requirements.

A researcher in a study who oversees multiple aspects of the study, such as concept development, protocol writing, protocol submission for IRB approval, participant recruitment, informed consent, data collection, analysis, interpretation and presentation.

Individual who is employed and/or involved in any aspect of conduct of protocol driven research. Example(s): administrators, clinical and data managers, clinical research pharmacists, clinical research associates, clinical trials compliance coordinators, clinical trials specialists, laboratory technologists, nurses, research services consultants, study coordinators and others.

Those individuals engaged in research.